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3 years ago

Can someone help me with 5/8+2/5 please

2 answers:

7 0

To add fractions we have to find a common denominator and then add. To find the common denominator of the fractions we can multiply the denominators together to get 40.

Multiply 5/8 × 5/5 = 25/40
Multiply 2/5 × 8/8 = 16/40

Now add the fractions

25/40 + 16/40 = 41/40 or 1 1/40

marishachu [46]3 years ago

5 0

Well you would have to make the bottom number equal, so the lcm (least common multiple) of 5 and 8 is 40. Which means for the first you have to multiply 5 and 8 both by five to get 25/40. Then multiply 2 and 5 both by 8 so 16/40 then add. So 25/40 + 16/40 = 41/40.

So the answer is 41/40, which reduced ia 1 and 1/40.

Hope that helps!

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Answer:

Step-by-step explanation:

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3 years ago

WILL MARK BRAINLIEST AND EXTRA POINTS ONLY HAVE 5 MINS

adelina 88 [10]

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Step-by-step explanation:

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3 years ago

For women aged 19-24, systolic blood pressures (in mm Hg) are normally distributed with a mean of 114.8 and a standard deviation

Mrac [35]

Answer: p = 0.00714

Step-by-step explanation:

Since the population standard deviation of the distribution is known, the z test ( which produces the z score) is the perfect test for finding the probability of the data set in the question.

From the question,

Population mean (u) = 114.8

Sample mean (x) = 121.5

Population standard deviation (σ) = 13.1

Sample size (n) = 23

The z score formulae is given below as

Z = x - u/σ/√n

Z = 121.5 - 114.8/(13.1/√23)

Z = 6.7/(13.1/√23)

Z = 6.7/2.731

Z = 2.45.

The question is interested in knowing the probability of mean systolic blood pressure greater than 121.5.

This implies that we are looking for the probability at which our z score is greater than 2.45: P(z>2.45)

The z score (z=2.45) has divided the distribution into two regions, z< 2.45 ( area to the left of the distribution) and z>2.45 ( area to the right of distribution).

Hence, p(z>2.45) + p(z<2.45) = 1

To get a the probability, we have to use a standard normal distribution table.

The table we have here gives probability of the distribution to the left ( that's area towards the left), hence we need to find p(z<2.45) first

From the table p(z<2.45) = 0.99286

But p(z>2.45) = 1 - p(z<2.45)

p(z>2.45) = 1 - 0.99286

p(z>2.45) = 0.00714

8 0

3 years ago

The pen for Ruth’s dog is 7 feet long and 6 1/2 feet wide. Her friend Ralph’s dog pen is 14 feet long and 6 1/2 feet wide. How m

Mkey [24]

Answer:

2 times larger

Step-by-step explanation:

Ralph's pen is 91 feet long

ruths is 45.5

Easily makes 91

7 0

2 years ago

Read 2 more answers

In this parallelogram m angle bad =75 so m angle bcd

Allisa [31]

The complete question in the attached figure

we know that
m angle bad =75°
remember that on parallelogram
(∠A + ∠B) = 180°
[Since, sum of the interior angles on the same side of the transversal is 180°]
therefore
∠B=180°-∠A=180°-75°=105°
∠B=105°
Similarly
∠B + ∠C = 180°
∠C + ∠D = 180°
and ∠D + ∠A = 180°
Thus, the sum of any two adjacent angles of a parallelogram is 180°.

m angle bcd=∠C=180-∠B=180°-105°=75°

the answer is m angle bcd=75°

8 0

3 years ago